For the first time, x402 payments have cryptographic proof. 📜 Every payment through Sentinel generates a signed receipt, agent, endpoint, amount, tx hash, and a SHA-256 hash of the actual data received. Anyone can verify it. No trust required. What this means👇

1/ Why this matters: Your agent says "I paid $0.05 for weather data." Cool. Prove it. The Sentinel Receipt contains the tx hash AND a hash of the response. You can verify the payment happened AND what was received. No more blind trust. No more "the agent said so." Cryptographic proof.

2/ What this unlocks: → Agent A buys data. Agent B needs the same data. Agent B checks Sentinel, receipt exists. Skips the payment. Money saved. → AI outputs can cite verifiable sources. Not hallucinations. Real data, real receipt, real proof. → Hand the receipt to an auditor. Case closed. x402 solved payments. Sentinel Receipts solve proof.